migrated from redux to recoil

frontend/src/atoms/i18n.ts

@@ -0,0 +1,9 @@
+import { selector } from 'recoil'
+import I18nBuilder from '../lib/intl'
+import { languageState } from './settings'
+
+export const i18nBuilderState = selector({
+  key: 'i18nBuilderState',
+  get: ({ get }) => new I18nBuilder(get(languageState)),
+  dangerouslyAllowMutability: true,
+})